negative friction 中文意思是什麼
negative friction
解釋
負磨擦-
Many survey data refer to mortal down load and sedimentation be produced due to the negative friction in pile foundation. the inequable sedimentation endanger the pile foundation greatly
國內外一些實測資料表明樁基礎在使用階段負摩擦力可能產生非常大的下拉荷載和沉降，尤其產生的不均勻沉降對基礎危害最大。 -
Study on calculation of negative skin friction resistance on piles
基樁負摩阻力計算方法初探 -
Negative skin friction of driven pile
打入樁負摩阻力 -
Negative skin friction of pile
深基礎負摩擦力 -
When the width of the foundation is smaller, the friction force is firstly increased from zero at the central area of the foundation, then decreased to zero at the edges of the foundation, hence there is a peak ; when the width of the foundation and the thickness of the soft ground is larger, the frication force is almost zero from the central area of the foundation to a certain distance, then increased, at last decreased to zero at the edges of the foundation, therefore there is a peak ; and when the width of the foundation is larger and the thickness of the soft ground is smaller, the friction force is firstly increased from zero at the central area of the foundation in the negative direction, then decreased to zero, so there is a negative peak, then increases in the positive direction, eventually decreased to zero at the edges of the foundation, hence there is a positive peak
當基礎寬度較小時，從中心線為零處開始增加，達到峰值后，開始減小，直至基底邊緣處為零；當基礎寬度和軟土地基厚度較大時，從中心線處開始，向外側延伸一定距離，幾乎為零，然後開始增加，達到峰值后，開始減小，直至基底邊緣處為零；當基礎寬度較大，並且軟土地基厚度較小時，從中心線為零處開始反向增加，達到反向峰值后，然後反向減小，減小到零后，逐漸正向增加，達到峰值后，再逐漸減小，直至基底邊緣處為零。 -
In this thesis summarize how to avoid and deal with the negative friction in designing and using. researches indicate : ( 1 ) the negative friction in pile will lead to large number of down load in some designs. this friction must be considered in design to avoid the sedimentation and destroy in the building
研究結果表明： （ 1 ）在工程設計中，有些情況由於負摩擦力產生的下拉荷載數值相當大，在設計中應充分給予重視，以避免在使用中由於下拉荷載使樁的軸向荷載增加引起樁的沉降或不均勻沉降，而導致建築物的破壞。 -
Thaw settlement cause negative friction. this paper base on the thought of " initiative cooling ", aim at three problems existing in common concrete pile used in frozen soil, a new type of pile is proposed to overcome the disadvantages of the classical pile used in frozen soil. pile body within active layer is fluted and refilled with porous materials such as gravels and ballasts, convection will be occur and then thermal exchange inside porous material in winter while only heat conduction exists in summer, as a result the soil around flutings will be cooled, so the top line of permafrost will be drive up
本文基於「主動冷卻」地基的思想，以及針對凍土地區普通混凝土樁存在的三大問題，提出了一種新型樁的設計思路，運用數值模擬試驗手段對其冷卻機理與加固機理進行了系統研究，即在凍融活動層的深度范圍內，在混凝土樁身的表面刻槽，修築完時槽內填充碎石、塊石等多孔介質，通過外界大氣溫度的自然波動下多孔介質在冬季時存在的對流換熱機制，而在夏季只存在熱傳導，來達到主動冷卻樁周凍土和抬升凍土上限的目的。 -
The result shows that a negative friction - velocity slope can not always cause squeal. it is often observed that the squeal can also occur in the area with a positive friction - velocity slope
試驗發現，摩擦噪聲既可以在摩擦力-相對滑動速度負斜率的區域發生，也可以在正的摩擦力-相對滑動速度斜率的區域發生。 -
This phenomenon shows that stick - slip motion and negative friction - velocity slope are not responsible for the present squeal. it is because these two generation mechanisms of squeal only govern the tangential vibrations
這個現象否定摩擦噪聲發生的兩個機理：粘著-滑動機理和摩擦力-相對滑動速度負斜率機理，因為這兩個機理描述的是切向發生的摩擦振動。 -
In the paper, through the example of the waiting hall of xt an international airport, several main questions meet in the design have been discussed, analyzed and solved, which include in negative friction force around pile in collapsible loess, the calculating method of bearing capacity of pile. the crack control methods of analysis and design in the super - length reinforced structure have been tested in the project, and reached the effect to be hoped
本文通過西安咸陽國際機場新航站樓工程設計的具體實例，分析、論述了建築結構在設計中遇到並解決的幾個主要問題：如自重濕陷性黃土場地樁基負摩阻力問題；淺層土雖經強夯但下層土仍有可能產生負摩阻力時樁的承載力計算方法；對鋼筋混凝土結構的裂縫控制實現超長設計的分析和設計對策，經過工程驗證，達到了預期的效果。 -
The calculation of negative friction on pile foundation by effective stress iterative method
有效應力迭代演算法計算樁基負摩擦力 -
Due to the important infection in using foundation, the negative friction in pile has became one of the engineering skill focus
鑒于負摩擦力對樁基礎應用過程中的重要影響，樁基礎的負摩擦力已經成為基礎工程界的一個技術熱點。 -
( 3 ) the negative friction must be avoid on construction. when the friction has been founded, people must deal with by the method in this thesis
（ 3 ）在施工中要防止負摩擦力產生，對已經產生負摩擦力的樁基礎按本論文提到的方法及時救治。 -
( 2 ) in project designing the negative friction must be calculate by the method in this thesis. parameters of vertical weight and sedimentation must be checked to ensure the design security
（ 2 ）在工程設計中，應當按本論文闡述的方法對樁的負摩擦力進行計算，驗算樁基的豎向承載力和沉降等參數，保證工程設計的安全性。 -
In engineering practice, negative friction must be considered to ensure the foundation stability. the measure to avoid the negative friction must be carry out in construction phase and to prevent the negative friction in using
在工程實踐中，要在設計階段即考慮可能出現的負摩擦力以保證基礎的穩定性，在施工階段要採取必要的措施避免出現負摩擦力，使用階段出現的負摩擦力也要及時防治。 -
Along with the piles technology " s development and construct skill bring forth the fresh, pile has became the broadest foundation forms in project item. the negative friction in pile " s designing and constructing is acquainted with for engineer
隨著樁基技術的發展和施工工藝的推陳出新，樁基礎已經成為工程建設中應用最廣泛的基礎形式，樁基礎在設計和施工中產生的負摩擦力也漸漸為人們所認識。 -
This thesis put forward a systemic method to settle the negative friction in project design. it includes when the negative friction must be consider, the zero position decided, count the down load, the negative friction group pile, the infection on end - bearing and sedimentation and stability, how to deal with in design to avoid the negative friction and how to solve when the negative friction produced
本文提出了在工程設計中如何處理樁基負摩擦力的方法，包括什麼情況下考慮負摩擦力、負摩擦力中性點位置的確定、樁基下拉荷載的計算、負摩擦力的群樁效應、負摩擦力對樁基豎向承載力和沉降的影響、設計施工中如何避免出現負摩擦力以及對已經出現的負摩擦力如何根治。 -
What ’ s more, it is effective way to study the negative friction, the side friction of pile - soil, because its o - cell can be placed any part of the pile. but self - balanced testing method is incapable of acquiring the conventional load - settlement curve, q - s curve, several transformation method have been developed
但是，自平衡試樁法不能直接得出傳統的荷載? ?沉降關系，由此方法得到的兩條q ~ s曲線，必須將其轉換為傳統加載的q ~ s曲線后才能分析試樁的沉降量。 -
The cfg pile compound ground negative friction studies
樁復合地基負摩阻力的研究 -
Using continuous and border conditions of each layer, the negative friction will be attained. the character of soil which is around an in the tip of the pile varied greatly. we must select different hardening or soft model
由於樁側和樁尖土性質變化較大，因此對多層土各土層可依據實際情況選擇是採用雙折線模型的硬化模型還是軟化模型。
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